where he basically took gingrich's pants off on the issue of what was in his investment portfolio and won that state by a big margin. this is obviously tk- different. it's a national audience, not a republican audience, he has to win people over. it's a different kind of challenge over a sitting president who is pretty smooth performer. what john roberts said is right, debates sometimes make a difference but not very often. normally what happened in debates people for you going in are still for you coming out and not a lot of minds get chained. chris christie saying it could change everything, it could happen but not very much. martha: if somebody loses their pants it might be a game changer. we'll be watch that very closely. >> that depends, martha entirely on the design of the electri lecterns. >> we'll wait for the town hall format and hope for that perhaps. you just mentioned chris christie, what do you think he is up to by that comment? >> i have no idea and i'm sure the romney headquarters in boston, they are scratching their heads up there about that. you don't want to raise ex